feat: Add solution for LeetCode problem 198

Author: WhiteHyun

house-robber/WhiteHyun.swift

@@ -0,0 +1,19 @@
+//  
+//  198. House Robber
+//  https://leetcode.com/problems/house-robber/description/
+//  Dale-Study
+//  
+//  Created by WhiteHyun on 2024/07/06.
+//  
+
+class Solution {
+  func rob(_ nums: [Int]) -> Int {
+    var previous = 0
+    var current = 0
+
+    for element in nums {
+      (previous, current) = (current, max(element + previous, current))
+    }
+    return max(previous, current)
+  }
+}